Even if you could load all your artists, albums, etc. beyond 255, it's probably wouldn't be practical anyway. Unlike the iPod, where you can whip through all these in practically no time flat with your scroll wheel as it automatically accelerates the longer you scroll, using the iDrive takes forever to scroll. I did a test and it took me 1 minute and 16 seconds to scroll through the 255 artists it loaded up. That works out to about 10 artists every 3 seconds. For the poster here who has over 800 artists, that would end up working out to over 4 minutes to get to ZZ Topp. Are you really ever gonna do that?? Even just to get to the 100th artist takes 30 seconds.

True--the force feedback of the iDrive controller (in nav equipped cars) when you get to the bottom of a page also makes the process slow and cumbersome.